{
  "task_id": "DEV-000118",
  "task_revision": 1,
  "architecture_revision": "ADR-0018",
  "base_repo_revision": "a6eb4ab",
  "risk_tier": "E",
  "intent": "Add typed artifact attestation for agent-produced evidence with digest, source/worktree, producer run and test provenance.",
  "requirement_ids": ["WP-301", "Artifact attestation", "Independent evidence refs"],
  "allowed_change_scope": {"modules": ["artifact-agent-evidence"], "paths": ["contracts/artifact/**", "tests/agent_execution/**", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000118-agent-artifact-attestation.json"]},
  "forbidden_change_scope": {"paths": ["architecture/**", "database/**", "migrations/**", "deploy/**", "security/**", "cmd/**", "runtime/**", "adapters/**", ".gitea/**"]},
  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
  "contracts": {"consume": ["ADR-0017 Artifact ownership", "ADR-0020 agent evidence attestation", "Existing AgentRun identity"], "may_change": ["Artifact agent attestation contract"]},
  "semantic_owner": "artifact-agent-evidence",
  "canonical_state": [],
  "state_transitions": ["agent output -> attested artifact evidence", "missing provenance -> non-attested result"],
  "side_effects_and_privileges": ["Pure validation; no filesystem access, merge, deployment, credential access or external mutation"],
  "persistence_and_migrations": ["No schema or migration changes"],
  "failure_retry_restart": ["Attestation is immutable; changed digest/source requires a new attestation"],
  "assumptions": ["Artifact storage computes or verifies digest later", "Producer run and source revision are durable refs", "Verifier remains distinct from producer"],
  "acceptance_scenarios": ["Complete attestation validates", "Missing digest/source/worktree/test evidence rejects", "Attestation binds to one producer run", "Changed artifact requires a new attestation"],
  "required_tests": ["go test ./...", "go vet ./...", "go run ./cmd/devctl preflight -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-diff -active dev/ACTIVE_TASK.json", "go run ./cmd/devctl check-architecture", "go run ./cmd/devctl/independent", "git diff --check", "artifact attestation tests"],
  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_SPEC_GAP", "BLOCKED_BY_CONFLICT"]
}